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Instruction for use | Supercal 5
5.7 M-Bus Communication
M-Bus is embedded in the new Supercal 5 hardware. Up to two further communication mod-
ules can be added in the available slots. This ensures that up to three M-Bus requests for
different applications can be processed and answered simultaneously. The two additional
electrical pulse inputs are automatically integrated into the M-Bus telegram and transmit-
ted. For unambiguous identification of the two electrical pulse inputs, one identification
number and one fabrication number can be set respectively.
The Supercal 5 operates with a variable data structure. An individual primary address and
baud rate can be set for each M-Bus output.
An M-Bus “application reset”, will set the factory settings according to standard EN 1434.
5.7.1 Timing M-Bus Communication
187 ms
4.6 -187ms 1 - 256 bytes
M-Bus
Command
M-Bus
Answer
M-Bus
Answer
Total exchange with 2 retries
1 - 256 bytes
13 -138 ms
4.6 -187 ms
x
Received
by the SC5
Send
by the SC5
M-Bus interface : communication timings
According to EN13757-3 and EN1434-3
Retry M-Bus
Command §
M-Bus
Command
187 ms
Retry M-Bus
Command §
Total exchange without retry
x = 5 bytes (SND_NKE or REQ_UD2)
§ only if necessary
x
x
x
5.7.1.1 Technical Characteristics of embedded M-Bus
Designation
Description
Interface definition
According to EN 1434-3
Interface
potential-free, reverse polarity protected
Transmission speed
300. . 9,600 baud (… 4,800 baud with
battery supply) selectable with Superprog
Android & Superprog Windows.
Data structure
variable
Designation
Value
Supply voltage
UMU,M (MARK)
36 V
UMU,S (SPACE)
24 V
UM,M (SPACE)
12 V
UM,S (MARK)
11,3 V
Supply current
IM
1,5 mA
IS
20 mA
Summary of Contents for Supercal 5 I
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Page 6: ...6 Instruction for use Supercal 5...
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